CVE-2022-4304

01/תיאור (מקור, אנגלית)

A timing based side channel exists in the OpenSSL RSA Decryption implementation which could be sufficient to recover a plaintext across a network in a Bleichenbacher style attack. To achieve a successful decryption an attacker would have to be able to send a very large number of trial messages for decryption. The vulnerability affects all RSA padding modes: PKCS#1 v1.5, RSA-OEAP and RSASVE. For example, in a TLS connection, RSA is commonly used by a client to send an encrypted pre-master secret to the server. An attacker that had observed a genuine connection between a client and a server could use this flaw to send trial messages to the server and record the time taken to process them. After a sufficiently large number of messages the attacker could recover the pre-master secret used for the original connection and thus be able to decrypt the application data sent over that connection.

02/מוצרים מושפעים

openssl: openssl; stormshield: endpoint security; stormshield: sslvpn; stormshield: stormshield network security

03/קישורים10

• www.openssl.org/news/secadv/20230207.txt Vendor Advisory
• www.openssl.org/news/secadv/20230207.txt Vendor Advisory
• security.gentoo.org/glsa/202402-08
• psirt.global.sonicwall.com/vuln-detail/SNWLID-2023-0003
• security.gentoo.org/glsa/202402-08
• cert-portal.siemens.com/productcert/html/ssa-203374.html
• cert-portal.siemens.com/productcert/html/ssa-264814.html
• cert-portal.siemens.com/productcert/html/ssa-337522.html
• cert-portal.siemens.com/productcert/html/ssa-398330.html
• cert-portal.siemens.com/productcert/html/ssa-556635.html